JPH02144433A - Constructing connection for column-girder - Google Patents

Abstract

PURPOSE:To heighten rigidity by laying a steel girder, with stud bolts planted thereto, in a way that the girder covers a span between two reinforced concrete columns facing each other, after casting concrete to the column up to the underside of the girder, and by casting concrete only to capital parts. CONSTITUTION:After casting concrete to a reinforced concrete columns A up to the underside of a girder, a steel girder B, with stud bolts 1 planted thereto, is laid, spanning a distance between the columns A, erected facing each other with the column's main reinforcements 2 protruding therefrom, and placed at the inside of each of capital parts. The steel girder ia then connected, at its opposite ends, to the columns through steel sheets to which the girder is fastened with bolts. Bottom reinforcements 6 and top reinforcements 6' are then arranged over each of the opposite ends of the capital parts. Tie-hoops 7 are arranged encircling the column's main reinforcements 2, and stirrups 8 are also arranged encircling the top and bottom reinforcements 6' and 6. Forms are then constructed for connection of the column-girder, and after forms for a floor are also constructed, concrete is cast for the connection and the floor.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a column-beam joint construction method in a structure consisting of reinforced concrete columns and steel beams.

(Prior art) As shown in Japanese Unexamined Patent Application Publication No. 59-179946, a conventional construction method of this type is to construct a steel beam with large reinforcements fixed at the ends, and use the same reinforcements to connect the main reinforcements of the column and the band. A construction method has been proposed in which the column is supported between the reinforcements, the formwork of the column is assembled in this state, and concrete is poured.

(Problems to be Solved by the Invention) In the conventional construction method described above, the reinforcement arrangement at the joints of columns and beams is complicated, and the ends of the steel beams with thick reinforcing reinforcements cannot be accommodated before concrete pouring. It is complex and difficult to support the weight of the steel beams.

In general, in structures consisting of reinforced concrete columns and steel beams, the steel beams tend to deform when stress is transferred between the steel beams and the reinforced concrete columns, and as the steel beams deform, stress transfer is concentrated and Peeling is likely to occur.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to construct a capital section of highly rigid steel-framed reinforced concrete, to ensure smooth transmission of stress, and to streamline construction. The main point of this invention is to provide a shikiguchi construction method for columns and beams.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the J-column and beam joint construction method according to the present invention, in a structure consisting of reinforced concrete columns and steel beams, concrete is applied to the reinforced concrete columns to the bottom of the beams. Then, a steel beam with stud bolts is placed horizontally between the adjacent columns, and within the column head of the reinforced concrete column, through a connecting steel plate erected at the stud head. The adjacent steel beams are joined, then main beam reinforcement is placed across the end portions and column heads of each steel beam, and then the beam end portions and column heads are reinforced with ribs and ties, respectively. A capital section of steel-framed reinforced concrete will be constructed by pouring concrete over the two sections.

(Function) As described above, in the present invention, concrete for a reinforced concrete column is poured to the bottom of the beam, and with the main reinforcement of the column protruding upward, a steel beam with stud bolts is attached to the adjacent column. A joint in which the same steel beams are horizontally mounted between adjacent columns without requiring support, and adjacent steel beams are erected in the same column head within the column head of the column. After that, main beam reinforcement is placed across the end portion of the steel beam and the column head, and then the beam end portion and the column head reinforced with ribs and stirrups are connected. By pouring concrete across the bridge, a highly rigid steel reinforced concrete capital section is constructed.

Therefore, the reinforced concrete column and the steel beam are integrally connected via the highly rigid steel-framed reinforced concrete capital part, and stress transmission between the column and beam is reliably carried out, and deformation of the beam end is suppressed. Coupled with the fact that stud bolts were erected to increase shear strength, stress was gradually transmitted from the steel beam to the reinforced concrete column, causing concrete spalling at the contact surface between the steel beam end and the concrete. There's nothing to do.

Furthermore, by installing a steel beam with stud bolts installed deep into the column head and connecting it via the joining steel plate, the steel beam can increase the shear strength of the column-beam joint. increases, and destruction of the beam-column joint is prevented.

(Example) The present invention will be explained below with reference to illustrated embodiments.

Concrete for the reinforced concrete column (A) is poured to the bottom of the beam (see Figure 1). Next, the steel beam (B), such as a steel beam (shaped steel), with stud bolts (1) is placed, and the column main reinforcement (2) is placed. - A steel plate light mortar installed horizontally across the column heads of adjacent reinforced concrete columns (A) that protrudes upward, and the web portion of each steel beam (B) is level-adjusted at the center of the column head (
3) The steel beam (B) is joined to the joining steel plate (4) by welding using the bolt (5) (see Figure 2). It's okay.

Fig. 12 shows the structure of the attachment part of the joining steel plate (4) to the column head, in which a disk (4c) is attached to the lower end of the cross-shaped steel plate (4b) with bolt holes (4a) arranged in rows along the edge. is fixed to the body, and the same circle 1 (4c) is mounted and fixed on the level-adjusted steel plate light mortar (3) above the column head.

In the figure, (4d) is a notch provided at the lower edge of the cross-shaped steel plate (411), and the steel beam (B) is located within the notch (4d).
The lower flange of the is designed to fit.

In the embodiment shown in FIGS. 13 and 14, a loose hole (4e) is formed in the disc (4c) of the joining steel plate (4).
is drilled, and an anchor bolt (4f) planted on the reinforced concrete column (1) is inserted into the loose hole (4e) to prevent the joining steel plate (4) from shifting.

In this way, the steel beams (B) are hung horizontally between the columns, and the joining steel plates (
4), and then a lower end main reinforcement (6) having a hook at the end, spanning the end of the steel beam (B) and the column head.
, place the tie reinforcements (7) between the column main reinforcements (2), and then install the upper end main reinforcements with hooks at the ends across the beam end portion and the column head, and then install the upper and lower end main reinforcements ( 6'l (
6) Place ribs (8) in between. (See Figure 3) Next, install the formwork (9) for the column and beam joints, and also install the floor formwork (9).
(not shown). (See Figure 4) Next, the concrete 00) of the joint section and the floor concrete (It)
The columns and beams are connected together through the capital section of the highly rigid steel-framed reinforced concrete constructed in this way. (See Figures 5, 6, and 9) In the figure, (C) is a small beam.

Note that the above embodiment shows a case where the steel beams (B) intersect with each other in a cross shape at the column head, but in Figs. Indicates the case where the type is crossed.

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

In this way, according to the embodiment, the reinforced concrete column (
Concrete from A) is poured to the bottom of the beam, and a steel beam (B) is placed horizontally within the column head of the company (^), and the steel beam (B) is placed horizontally through the connecting steel plate (4) installed at the head of the stud. B) Bolt each other (
5) The work can be significantly simplified by repeating the simple work of placing cast-in-place concrete after joining or welding and assembling columns and beams.

Further, according to the embodiment, a steel beam (B) is provided in the column head.
By mounting the steel beam (B) on the column (A), it is possible to simply set the same steel beam (B) to the column (A) without requiring support, and in addition, concrete can be placed using on-site reinforcement to provide rigidity to the column head. A high steel-framed reinforced concrete capital section 021 is constructed, and the columns (A) and beams (B) are integrally joined by the capital section 0'IJ to achieve rational stress transmission between the columns and beams. The vertical stud bolts (1) increase shear strength and prevent concrete from peeling off at the ends of the steel beams when stress is transmitted.

Furthermore, adjacent steel beams (B) with stud bolts (1) installed up to the inside of the column head are installed and connected with a joining steel plate (4), so that the column head is a steel frame of the same steel beam. Shear reinforcement is applied to prevent the beam-column joint from collapsing.

Figures 1θ and 11 show another embodiment of the present invention, in which the cross section on the capital side is enlarged and the ties are doubled to further increase the rigidity and shear strength of the column-beam joint. It is.

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

(Effects of the Invention) According to the present invention, by mounting a steel beam between the columns of reinforced concrete columns in which concrete is poured to the bottom of the beam, the steel beam can be mounted without requiring support from the column. It is easy to set up, and concrete is poured using on-site reinforcement to construct a highly rigid steel reinforced concrete capital section at the column head, ensuring stress transmission between the columns and beams through the capital section. ,
Coupled with the fact that the shear strength is increased by the stud bolts erected on the steel beam, rational stress transmission is achieved and separation of concrete at the ends of the steel beam is prevented.

In addition, adjacent steel beams with stud bolts installed up to the inner position of the column head are installed and connected via a joining steel plate installed at the column head, so that the column head is connected to the steel frame of the same beam. Shear reinforcement prevents the column head from collapsing.

Furthermore, the present invention repeats the simple work of pouring concrete for a reinforced concrete column to the bottom of the beam, setting a steel beam inside the column head of a stud, attaching formwork only to the capital portion, and pouring cast-in-place concrete. By assembling IN columns and beams, the work can be significantly simplified and the construction method is highly safe.

[Brief explanation of the drawing]

Figures 1 to 5 are side views showing the steps of an embodiment of the joint construction method for columns and beams according to the present invention, and Figure 6 is a cross-sectional view showing the joint section of the columns and beams constructed by the same construction method. The plan view, FIGS. 7 and 8 are cross-sectional plan views showing other examples of the joint part of the same column and beam, and FIG. 9 is a partial slope view of a structure having the same joint part, and the first θ The figure is a cross-sectional plan view showing the joint part of a column and beam constructed according to another embodiment of the construction method according to the present invention, FIG. 11 is a partial slope view of a structure having the same joint part, and FIG. 12 is a column head. It is a vertical cross-sectional view as well as a slope view. (A) - Reinforced concrete column (B) Steel beam (1) - Stud bolt (2) - Column main reinforcement (3) - Steel plate support mortar (4) - Steel plate for joining ( 5)
...Bolt (6) ...Lower end main reinforcement (6)
-Top main reinforcement (7)... -Strap bar (8)...
・-Auxiliary bars (9)...Formwork 0ω...-Joining section concrete O[)-Floor concrete 021...-Capital department agent Patent attorney Shige Okamoto 2 outsiders Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] In a structure consisting of reinforced concrete columns and steel beams, concrete is poured into the reinforced concrete columns to the bottom of the beams, and then steel beams with stud bolts are placed horizontally between the adjacent columns, and the above-mentioned Within the head of the reinforced concrete column, the adjacent steel beams are connected via a joining steel plate erected at the head of the column, and then main beam reinforcement is placed across the end portion of each steel beam and the head of the column. A column-beam joint construction method characterized by constructing a capital section of steel-framed reinforced concrete by reinforcing the beam and then pouring concrete over the column head and the end portion of the beam each reinforced with ribs and ties, respectively. .